Created
August 27, 2024 13:24
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| # Heap | |
| # # Class User | |
| # { | |
| # userid : id | |
| # tweets : [], | |
| # followes : | |
| # } | |
| # # Class Tweet | |
| # { | |
| # tweetid : id , | |
| # timestamp : time | |
| # } | |
| class Tweet: | |
| def __init__(self,tweetId,timestamp) : | |
| self.tweetId = tweetId | |
| self.timestamp = timestamp | |
| class User: | |
| def __init__(self,userId): | |
| self.userId = userId | |
| self.tweets = [] | |
| self.followees = set() | |
| def postTweet(self,tweetId,timestamp): | |
| tweet = Tweet(tweetId,timestamp) | |
| self.tweets.append(tweet) | |
| pass | |
| def follow (self , followeId): | |
| self.followees.add(followeId) | |
| def unfollow(self,followeId): | |
| self.followees.remove(followeId) | |
| class Twitter: | |
| def __init__(self): | |
| self.timestamp = 0; | |
| self.users = {} | |
| def postTweet ( self,userId,tweetId): | |
| if userId not in self.users: | |
| user = User(userId) | |
| self.users[userId] = user | |
| user = self.users[userId] | |
| user.postTweet(tweetId,self.timestamp) | |
| self.timestamp = self.timestamp+1 | |
| def getNewsFeed(self ,userId): | |
| if userId not in self.users: | |
| return [] | |
| # store all tweets | |
| tweets = [] | |
| # HEAP | |
| # Check | |
| # TOP value is MIn value and bottom | |
| # user = self.users[userId] | |
| # # followes | |
| # # put all tweets form followes to store | |
| # for followeID in user.followees: | |
| # # sort based on time | |
| # # return top 10 tweets | |
| min_heap = [] | |
| user = self.users[userId] | |
| for tweet in user.tweets: | |
| min_heap.push((tweet.timestamp,tweet.tweetid)) | |
| if(min_heap.lenght > 10){ | |
| min_heap.pop() | |
| } | |
| for followerId in user.followes: | |
| if followerId in self.users : | |
| followe = self.users[followerId] | |
| for tweet in followe.tweets: | |
| min_heap.push((tweet.timestamp,tweet.tweetid)) | |
| if min_heap.lenght > 10 | |
| min_heap.pop() | |
| recent_tweets = [] | |
| while min_heap : | |
| return [] | |
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